I am selling my Action Products kit. It's been a great system. It offers a very smooth arm with an 11-77 lb weight range and a boom range of 36" it uses 8 small springs in each section of the arm.
The sled is carbon fiber, it comes with two of the 2 pin Lemo break out boxes. The top stage is adjustable to different size dovetail plates.
The vest is a back mounted.